{
  "ptid_time": "136_S_0196_2007-05-07",
  "img_path": "/data/qiuhui/data/adni/images/136_S_0196/2007-05-07/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 31,691 mm³, 12.9% above the reference mean. With a Z-score of 0.30 (61.6th percentile), this represents normal volume ; hippocampal volume measures 6,658 mm³, 6.4% below the reference mean. With a Z-score of -0.59 (27.8th percentile), this represents normal volume ; whole brain volume measures 935,117 mm³, 4.1% below the reference mean. With a Z-score of -0.51 (30.5th percentile), this represents normal volume ; entorhinal cortex volume measures 3,181 mm³, 13.4% below the reference mean. With a Z-score of -0.82 (20.6th percentile), this represents normal volume ; fusiform gyrus volume measures 16,808 mm³, 1.2% below the reference mean. With a Z-score of -0.11 (45.6th percentile), this represents normal volume ; middle temporal gyrus volume measures 18,001 mm³, 6.1% below the reference mean. With a Z-score of -0.53 (29.8th percentile), this represents normal volume . ",
  "text_data": "Age is 79.0 years. Gender is Female. Education: 18 years. MMSE: 28.0. Logical Memory: 15.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The brain volume measurements, including hippocampal and entorhinal cortex volumes, are within normal ranges despite being slightly below the reference mean (Z-scores between -0.11 and -0.82). The MMSE score of 28 is within the normal range, and the absence of APOE4 alleles reduces genetic risk. No significant atrophy or cognitive impairment is evident.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-26T15:59:56.691394"
}